Photochemical and thermal evolution of interstellar/precometary ice analogs

Details Photochemical and thermal evolution of interstellar/precometary ice analogs Photochemical and thermal evolution of interstellar/precometary ice analogs

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...76..225a&link_type=abstract

Icarus (ISSN 0019-1035), vol. 76, Nov. 1988, p. 225-252.

Computer Science

222

Anions, Chemical Evolution, Comets, Interstellar Gas, Photochemical Reactions, Carbon Compounds, Cosmic Dust, Ice, Methyl Alcohol, Photolysis, Temperature Effects, Ultraviolet Radiation

Scientific paper

An experimental investigation of the photochemical and thermal evolution of ices deposited at 10K which contain primarily H2O, CH3OH, NH3, and CO mixed in relative proportions consistent with the proposed composition of interstellar ices is presented. These experiments, which are relevant to both interstellar and cometary ices, are the first described in which CH3OH (methanol) is a major constituent of the ice. The relevance of the results to questions concerning the composition of interstellar and cometary ices, and the scale heights of photofragments in cometary comae is discussed. The results may have some bearing on the recent suggestion that polyoxymethylene is present in Comet Halley.

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